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Volume 117, Issue 22, 08 December 2002
The naphthalene-benzene anion: Anion complex of aromatic hydrocarbons with the smallest electron affinity117(2002); http://dx.doi.org/10.1063/1.1519002View Description Hide Description
The mixed cluster anions between naphthalene and benzene were studied by mass spectrometry,photoelectron spectroscopy, and theoretical calculations. We found clear evidence for a stable anion of the 1:1 complex, which has the smallest electron affinity measured so far for complexes of aromatic hydrocarbons. The photoelectron spectrum of was identical in shape with those of and implying the presence of a common ion core, in these systems. Thus is viewed to be where Bz stabilizes the core anion, as a neutral solvent. The geometry of was calculated to be T-shaped, with a strong character for the π-hydrogen bonding. An adiabatic electron affinity of 0.01 eV was determined from the measured vertical detachment energy of 0.03 eV and the theoretical estimate of the energy difference between the two neutral structures involved.